Patel Infrastructure DGM Interview Questions and Answers

Slab steel reinforcement typically uses 8mm to 16mm diameter bars.

• Slab steel reinforcement typically uses bars ranging from 8mm to 16mm in diameter

• The choice of diameter depends on the span, load, and design requirements of the slab

• Thicker bars are used for heavier loads and longer spans, while thinner bars are used for lighter loads and shorter spans

Shuttering quantity can be calculated by determining the surface area of the formwork and multiplying it by the depth of the concrete.

• Measure the length and width of the formwork

• Calculate the surface area by multiplying the length and width

• Multiply the surface area by the depth of the concrete to get the shuttering quantity

• Account for any additional formwork needed for corners or edges

Steel quantity can be calculated by using the formula: (D^2/162) x Length of steel

• Determine the diameter of the steel

• Calculate the length of the steel required

• Use the formula (D^2/162) x Length of steel to calculate the steel quantity

• Consider wastage and additional steel required for overlaps and joints

Initial setting time is the time taken by cement to harden to a certain degree.

• Initial setting time is the time taken by cement to harden to a certain degree.

• It is the time elapsed between the moment water is added to the cement and the time when the paste starts losing its plasticity.

• The initial setting time of cement is generally around 30 minutes to 1 hour.

• It is an important property of cement as it determines the t...read more

Lapping provides a smooth surface finish to the column.

• Clean the column thoroughly before lapping.

• Apply a lapping compound to the column surface.

• Use a lapping tool to rotate and move up and down the column.

• Continue lapping until the desired surface finish is achieved.

• Clean the column again after lapping to remove any residue.

Density of RCC is around 2500 kg/m3 and PCC is around 2400 kg/m3.

• RCC stands for Reinforced Cement Concrete and PCC stands for Plain Cement Concrete.

• Density of RCC depends on the mix design and the type of aggregates used.

• Density of PCC is lower than RCC due to absence of reinforcement.

• Density of concrete is an important factor in determining its strength and durability.

OPC is Ordinary Portland Cement while PPC is Portland Pozzolana Cement.

• OPC is made from raw materials like limestone and clay while PPC is made from a mixture of pozzolanic material and OPC.

• PPC has higher durability and strength compared to OPC.

• PPC is more eco-friendly as it uses industrial waste as a raw material.

• OPC is commonly used for construction of buildings and bridges while PPC is used for marine structures, hy...read more

The density of sand, water, and aggregate varies depending on their composition and temperature.

• The density of sand ranges from 1300 to 1700 kg/m³.

• The density of water is 1000 kg/m³ at 4°C.

• The density of aggregate varies depending on its size and composition.

• The density of fine aggregate ranges from 1600 to 1800 kg/m³.

• The density of coarse aggregate ranges from 1200 to 1500 kg/m³.

Clear cover provides protection and visibility.

• Clear cover protects the item from dust, dirt, and damage.

• Clear cover allows the item to be visible without removing the cover.

• Clear cover is commonly used for electronic devices, books, and documents.

Deduction rules for plastering in civil engineering

• Deductions are made for openings like doors and windows

• Deductions are made for thickness of plaster

• Deductions are made for uneven surfaces

• Deductions are made for wastage of material

• Deductions are made for scaffolding

• Example: If the area to be plastered is 100 sq. ft. and the area of openings is 20 sq. ft., then the net area for plastering will be 80 sq. ft.

Deduction rules for concrete

• Deductions are made to account for the shrinkage and settlement of concrete

• The deduction rate varies based on the type of concrete and the environmental conditions

• Typically, a deduction of 1/8 inch per 10 feet is made for normal weight concrete

• For lightweight concrete, the deduction rate is 1/4 inch per 10 feet

• The deductions are made from the specified dimensions of the concrete element

The cost of 1cum concrete work depends on various factors such as the type of concrete, location, labor cost, etc.

• The cost of 1cum concrete work varies depending on the type of concrete used, such as M20, M25, etc.

• The location of the construction site also affects the cost of concrete work.

• The cost of labor is another factor that affects the cost of concrete work.

• Additional costs such as transportation, taxes, and perm...read more

To check a window, inspect its frame, glass, and hardware for any damage or wear.

• Check the frame for cracks or warping

• Inspect the glass for chips, cracks, or fogging

• Test the hardware to ensure it opens and closes smoothly

• Check for any gaps or drafts around the window

• Look for signs of water damage or mold

• Consider the age and condition of the window

• Consult a professional if unsure about any issues